Evaluating undrained shear strength and sensitivity in soft sensitive clay using piezocone and field vane tests
Evaluating undrained shear strength and sensitivity in soft sensitive clay using piezocone and field vane tests
Evaluating undrained shear strength in clayey soils, especially soft sensitive clays in Finland, is crucial for several geotechnical engineering applications. In-situ investigation methods, including field vane and piezocone testing, offer versatile methodologies to assess the soil parameters, overcoming issues related to undisturbed soil sampling. Challenges in using the field vane in soft sensitive clays are discussed, as well as the improvements offered by piezocone testing. However, evaluating cone factors to assess the undrained shear strength is not straightforward, owing to soil strength anisotropy and overconsolidation effects. The paper focuses on assessing the undrained and remoulded shear strength in Finnish soft sensitive clays based on an extensive experimental program conducted at four different test sites, comparing the results obtained from piezocone, field vane, and fall cone tests. Discrepancies among these methods are highlighted, as well as possible improvements in devices and test interpretation to assess the soil parameters correctly.
Bruno Di Buo; Paul Wesley Mayne; Priscilla Paniagua; Shehab S. Agaiby
18th European Conference on Soil Mechanics and Geotechnical Engineering (ECSMGE2024)
B - Geohazards
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